Belimo SF24A-MOD - rotary actuator for dampers with safety function

Belimo SF24A-MOD actuator

Rotary actuator with safety function, designed to regulate dampers in stationary heating, ventilation and air conditioning systems. According to the technical data sheet, it supports air dampers with an area of up to approx. 4 m².

Key features and specifications

• Motor and safety function torque: 20 Nm.
• Rated voltage: AC/DC 24 V; frequency: 50/60 Hz.
• Communication: BACnet MS/TP, Modbus RTU (factory setting) and MP-Bus; modulating, communicating and hybrid control.
• Operating range Y: 2...10 V, adjustable to 0.5...10 V; feedback signal U: 2...10 V.
• Motor running time: 150 s / 90°, adjustable to 70...220 s. Safety function running time: <20 s @ -20...50°C, <60 s @ -30°C.
• Rotation angle: max. 95°; mechanical rotation angle stops and mechanical position indicator.
• Manual override with crank and locking switch; motor direction selected using the L/R switch.
• Universal clamp for 10...25.4 mm shafts; 1 m power and control cable, 6x 0.75 mm².
• Power consumption during operation: 8.5 W; at rest: 3.5 W; power for cable sizing: 11 VA.
• IP54 protection rating; ambient temperature -30...50°C [-22...122°F].

The integrated interface receives a digital control signal and reports the current status. The actuator supports connection of a passive, active or switching-contact sensor and transmission of its signal via the bus. Selected parameters can be changed using Belimo Assistant 2.